Low Pt loading high performance cathodes for PEM fuel cells |
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| Affiliation: | 1. School of Automotive Studies, 4800 Caoan Road, Tongji University, Shanghai, 201804, China;2. Wuhan Institute of Marine Electric Propulsion, Wuhan, 430064, China;1. Danish Power Systems, DK-3490, Kvistgård, Denmark;2. Department of Chemical Engineering, Middle East Technical University, 06800, Ankara, Turkey;3. Department of Chemical Engineering, Ondokuz Mayis University, 55139, Samsun, Turkey;1. Department of Chemical and Biomolecular Engineering, University of Connecticut, 191 Auditorium Road, Unit 3222, Storrs, CT 06269-3222, USA;2. Department of Materials Science and Engineering, University of Connecticut, 7 North Eagleville Road, Unit 3136, Storrs, CT 06269-3136, USA |
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| Abstract: | A simple direct mixing of carbon-supported catalysts with Nafion without adding any additional organic solvents was used to make electrodes for oxygen reduction in PEM fuel cells. For E-TEK 20% Pt/C, a Nafion content of 30% in the catalyst layer exhibited the best performance. Electrode dried from 90 to 150 °C showed little difference in performance. Highest power densities increased almost linearly with cell temperature, and values of 0.52, 0.60, 0.63, and 0.72 W/cm2 were achieved at 35, 50, 60, and 75 °C, respectively, for a cathode with a Pt loading of 0.12 mg/cm2 and operated using air at ambient pressure. A maximum performance was achieved with Pt loadings of 0.20±0.05 and 0.35±0.05 mg/cm2 for 20 and 40% Pt/C, respectively, while the maximum performance using 40% Pt/C was only slightly better than that using 20% Pt/C. A Nafion/carbon sublayer with up to 30% Nafion content added between ELAT and the catalyst layer did not show any effect on performance. |
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